part of part of immediately preceded by immediately preceded by occurrent oogenesis period fully grown oocyte with centered germinal vesicle stage fully grown oocyte with off-centered germinal vesicle stage A developing female gamete that has reached its full size and in which the germinal vesicle has moved asymmetrically to the cell periphery. The germinal vesicle is now close to the animal pole. ecao_developmental_stage primary oocyte